A relative newcomer that was only founded in 2014, ConvertKit has taken the world of email marketing by storm. According to the company, they now have nearly 20,000 active customers of their email services. Their affiliate program works by paying existing customers a lifetime 30 percent commission for referrals that subsequently become ConvertKit customers or who sign up for ConvertKit webinars and other digital products.

This relationship can take multiple forms. You may partner with a brand launching a specific product and receive a percentage of the revenue generated by your referrals. Or, if you work with websites like Amazon, you receive a percentage of whatever purchase a follower makes through your referral links, even if they don't buy the product you were specifically recommending.﻿﻿